Three hundred and sixtyur ban and rural Shi gellae isol atesrnwere analysed in r espec t t o scr ogr oupins , ser otypinS , biochemotypingrnand drug resistance . S. f l exne r i (50 . 55~ ) was mos t common , f ollowedrnby S dysente riue ( 32. 78%), S boydii ' ( 11 . 39% ) and S- sonnei ( 5 .28 %).rnI s olation r ates of dysente nriac , S- flexneria and S' sonnei we r erncomparable in r ur al and urban areas , except f or S. boydii which isrnmore common in urban areus (si gni fic a n t at P=O. 05 ) .